add time_series to projects#show cache key
add time_series to projects#show cache key

suyesh/Hours,rmangino/Hours,compwron/Hours,jnillo/Hours,suyesh/Hours,suyesh/Hours,DefactoSoftware/Hours,xuewenfei/Hours,HaraShun/Hours,ivanbenko/Hours,compwron/Hours,DefactoSoftware/Hours,leffen/Hours,mojacc/Hours,ipmobiletech/Hours,HaraShun/Hours,xuewenfei/Hours,rmangino/Hours,leffen/Hours,HaraShun/Hours,ivanbenko/Hours,rmangino/Hours,michalsz/Hours,tiy-tpa-ruby-q3-2015/Hours,mojacc/Hours,jnillo/Hours,suyesh/Hours,mojacc/Hours,michalsz/Hours,michalsz/Hours,ipmobiletech/Hours,DefactoSoftware/Hours,compwron/Hours,ipmobiletech/Hours,michalsz/Hours,leffen/Hours,ipmobiletech/Hours,jnillo/Hours,HaraShun/Hours,tiy-tpa-ruby-q3-2015/Hours,DefactoSoftware/Hours,jnillo/Hours,tiy-tpa-ruby-q3-2015/Hours,mojacc/Hours,compwron/Hours,xuewenfei/Hours,rmangino/Hours,tiy-tpa-ruby-q3-2015/Hours,xuewenfei/Hours,ivanbenko/Hours,ivanbenko/Hours,leffen/Hours